External Signaling using the C-123L/A or C-123LW

Updated on May 28th, 2026

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Summary

Wiring diagram of external signaling in conjunction with the C-123L/A or C-123LW. This can be used to trigger a bell, buzzer, sounder or anything that requires a contact closure when a call is placed from the door station.

Solution

Note: This station is discontinued and may no longer be supported. These instructions are provided to assist with operation and maintenance, and to guide upgrade paths.